{"instruction": "You are an expert in named entity recognition. Please extract entities that match the schema definition from the input. Return an empty list if the entity type does not exist. Please respond in the format of a JSON string.", "schema": ["engineering feature", "material", "biomedical", "process characterization", "machanical property", "process parameter"], "input": "The layer-by-layer generation of optimized trajectories is validated experimentally on a 6-axis robot using a PLA extrusion system ."}
{"engineering feature": [], "material": ["PLA"], "biomedical": [], "process characterization": [], "machanical property": [], "process parameter": []}